271 lines
6.6 KiB
C
271 lines
6.6 KiB
C
|
/*
|
||
|
|
* Backlight Driver for Nvidia 8600 in Macbook Pro
|
||
|
|
*
|
||
|
|
* Copyright (c) Red Hat <mjg@redhat.com>
|
||
|
|
* Based on code from Pommed:
|
||
|
|
* Copyright (C) 2006 Nicolas Boichat <nicolas @boichat.ch>
|
||
|
|
* Copyright (C) 2006 Felipe Alfaro Solana <felipe_alfaro @linuxmail.org>
|
||
|
|
* Copyright (C) 2007 Julien BLACHE <jb@jblache.org>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This driver triggers SMIs which cause the firmware to change the
|
||
|
|
* backlight brightness. This is icky in many ways, but it's impractical to
|
||
|
|
* get at the firmware code in order to figure out what it's actually doing.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/backlight.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/dmi.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
|
||
|
|
static struct backlight_device *mbp_backlight_device;
|
||
|
|
|
||
|
|
/* Structure to be passed to the DMI_MATCH function. */
|
||
|
|
struct dmi_match_data {
|
||
|
|
/* I/O resource to allocate. */
|
||
|
|
unsigned long iostart;
|
||
|
|
unsigned long iolen;
|
||
|
|
/* Backlight operations structure. */
|
||
|
|
struct backlight_ops backlight_ops;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Module parameters. */
|
||
|
|
static int debug;
|
||
|
|
module_param_named(debug, debug, int, 0644);
|
||
|
|
MODULE_PARM_DESC(debug, "Set to one to enable debugging messages.");
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Implementation for MacBooks with Intel chipset.
|
||
|
|
*/
|
||
|
|
static int intel_chipset_send_intensity(struct backlight_device *bd)
|
||
|
|
{
|
||
|
|
int intensity = bd->props.brightness;
|
||
|
|
|
||
|
|
if (debug)
|
||
|
|
printk(KERN_DEBUG "mbp_nvidia_bl: setting brightness to %d\n",
|
||
|
|
intensity);
|
||
|
|
|
||
|
|
outb(0x04 | (intensity << 4), 0xb3);
|
||
|
|
outb(0xbf, 0xb2);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int intel_chipset_get_intensity(struct backlight_device *bd)
|
||
|
|
{
|
||
|
|
int intensity;
|
||
|
|
|
||
|
|
outb(0x03, 0xb3);
|
||
|
|
outb(0xbf, 0xb2);
|
||
|
|
intensity = inb(0xb3) >> 4;
|
||
|
|
|
||
|
|
if (debug)
|
||
|
|
printk(KERN_DEBUG "mbp_nvidia_bl: read brightness of %d\n",
|
||
|
|
intensity);
|
||
|
|
|
||
|
|
return intensity;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dmi_match_data intel_chipset_data = {
|
||
|
|
.iostart = 0xb2,
|
||
|
|
.iolen = 2,
|
||
|
|
.backlight_ops = {
|
||
|
|
.options = BL_CORE_SUSPENDRESUME,
|
||
|
|
.get_brightness = intel_chipset_get_intensity,
|
||
|
|
.update_status = intel_chipset_send_intensity,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Implementation for MacBooks with Nvidia chipset.
|
||
|
|
*/
|
||
|
|
static int nvidia_chipset_send_intensity(struct backlight_device *bd)
|
||
|
|
{
|
||
|
|
int intensity = bd->props.brightness;
|
||
|
|
|
||
|
|
if (debug)
|
||
|
|
printk(KERN_DEBUG "mbp_nvidia_bl: setting brightness to %d\n",
|
||
|
|
intensity);
|
||
|
|
|
||
|
|
outb(0x04 | (intensity << 4), 0x52f);
|
||
|
|
outb(0xbf, 0x52e);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int nvidia_chipset_get_intensity(struct backlight_device *bd)
|
||
|
|
{
|
||
|
|
int intensity;
|
||
|
|
|
||
|
|
outb(0x03, 0x52f);
|
||
|
|
outb(0xbf, 0x52e);
|
||
|
|
intensity = inb(0x52f) >> 4;
|
||
|
|
|
||
|
|
if (debug)
|
||
|
|
printk(KERN_DEBUG "mbp_nvidia_bl: read brightness of %d\n",
|
||
|
|
intensity);
|
||
|
|
|
||
|
|
return intensity;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dmi_match_data nvidia_chipset_data = {
|
||
|
|
.iostart = 0x52e,
|
||
|
|
.iolen = 2,
|
||
|
|
.backlight_ops = {
|
||
|
|
.options = BL_CORE_SUSPENDRESUME,
|
||
|
|
.get_brightness = nvidia_chipset_get_intensity,
|
||
|
|
.update_status = nvidia_chipset_send_intensity
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* DMI matching.
|
||
|
|
*/
|
||
|
|
static /* const */ struct dmi_match_data *driver_data;
|
||
|
|
|
||
|
|
static int mbp_dmi_match(const struct dmi_system_id *id)
|
||
|
|
{
|
||
|
|
driver_data = id->driver_data;
|
||
|
|
|
||
|
|
printk(KERN_INFO "mbp_nvidia_bl: %s detected\n", id->ident);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dmi_system_id __initdata mbp_device_table[] = {
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookPro 3,1",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,1"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&intel_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookPro 3,2",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,2"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&intel_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookPro 4,1",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro4,1"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&intel_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookAir 1,1",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir1,1"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&intel_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBook 5,1",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,1"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&nvidia_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBook 5,2",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,2"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&nvidia_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookAir 2,1",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir2,1"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&nvidia_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookPro 5,1",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,1"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&nvidia_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookPro 5,2",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,2"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&nvidia_chipset_data,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.callback = mbp_dmi_match,
|
||
|
|
.ident = "MacBookPro 5,5",
|
||
|
|
.matches = {
|
||
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
||
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,5"),
|
||
|
|
},
|
||
|
|
.driver_data = (void *)&nvidia_chipset_data,
|
||
|
|
},
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init mbp_init(void)
|
||
|
|
{
|
||
|
|
if (!dmi_check_system(mbp_device_table))
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
if (!request_region(driver_data->iostart, driver_data->iolen,
|
||
|
|
"Macbook Pro backlight"))
|
||
|
|
return -ENXIO;
|
||
|
|
|
||
|
|
mbp_backlight_device = backlight_device_register("mbp_backlight",
|
||
|
|
NULL, NULL, &driver_data->backlight_ops);
|
||
|
|
if (IS_ERR(mbp_backlight_device)) {
|
||
|
|
release_region(driver_data->iostart, driver_data->iolen);
|
||
|
|
return PTR_ERR(mbp_backlight_device);
|
||
|
|
}
|
||
|
|
|
||
|
|
mbp_backlight_device->props.max_brightness = 15;
|
||
|
|
mbp_backlight_device->props.brightness =
|
||
|
|
driver_data->backlight_ops.get_brightness(mbp_backlight_device);
|
||
|
|
backlight_update_status(mbp_backlight_device);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit mbp_exit(void)
|
||
|
|
{
|
||
|
|
backlight_device_unregister(mbp_backlight_device);
|
||
|
|
|
||
|
|
release_region(driver_data->iostart, driver_data->iolen);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(mbp_init);
|
||
|
|
module_exit(mbp_exit);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
|
||
|
|
MODULE_DESCRIPTION("Nvidia-based Macbook Pro Backlight Driver");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_DEVICE_TABLE(dmi, mbp_device_table);
|